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Cushion|Natural|GIA

1.51ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 2567210753

Certificate GIA 2567210753

Diamond specifications and retailer prices

From $3,254 AUD
$2,286 USD
As of October 30, 2026
Save $9,730 AUD (75%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $12,985 AUD at William & Sons Jewelers · As of November 2, 2026
View at William & Sons Jewelers

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2567210753. Listed at 17 retailers as of October 30, 2026, with prices from $3,254 to $12,985, a $9,730 spread on the same certified stone. William & Sons Jewelers lists it at $12,985. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle34°
OriginNatural
Grading LabGIA
CertificateGIA 2567210753
Dimensions6.56 × 6.36 × 4.30 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizeNone
Top View
6.56 mm6.36 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2567210753
Side View
Table 63.0%Crown 38.5°Girdle: THN-STKPavilion 34°Culet: NoneDepth 67.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $5,019 AUD|Low: $3,254 AUD|High: $16,780 AUD|Avg: $5,327 AUD|+1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
William & Sons Jewelers
November 2, 2026
Retailer 16$3,254 AUD
Retailer 14$3,462 AUD
Retailer 6$3,567 AUD
Retailer 4$3,602 AUD
Retailer 11$3,697 AUD
Retailer 13$3,822 AUD
Retailer 12$3,822 AUD
Retailer 5$4,466 AUD
Retailer 8$4,564 AUD
Retailer 15$4,712 AUD
Retailer 2$4,869 AUD
Retailer 1$5,019 AUD
Retailer 3$5,025 AUD
Retailer 9$5,378 AUD
Retailer 10$5,413 AUD
Retailer 7$7,704 AUD
William & Sons Jewelers$12,985 AUD

27 data points across 17 retailers

17 retailers$3,254 AUD to $12,985 AUD

A
Cheapest Retailer
-
$3,254 AUD
$2,286 USD
A
Retailer 2
-
$3,462 AUD
HK$19,000 HKD
View
A
Retailer 3
-
$3,602 AUD
$2,530 USD
View
A
Retailer 4
-
$3,697 AUD
$2,597 USD
View
A
Retailer 5
-
$3,822 AUD
$2,685 USD
View
A
Retailer 6
-
$3,822 AUD
View
A
Retailer 7
-
$4,466 AUD
$3,137 USD
View
Retailer 8
-
$4,564 AUD
$3,206 USD
View
Price last confirmed 25 days ago
A
Retailer 9
-
$4,712 AUD
$3,310 USD
View
Retailer 10
-
$4,734 AUD
SGD 4,494 SGD
View
Price last confirmed 24 days ago
A
Retailer 11
-
$4,869 AUD
$3,420 USD
View
A
Retailer 12
-
$5,019 AUD
€3,358 EUR
View
A
Retailer 13
-
$5,025 AUD
$3,530 USD
View
B+
Retailer 14
-
$5,378 AUD
£2,975 GBP
View
A
Retailer 15
-
$5,413 AUD
$3,802 USD
View
Retailer 16
-
$7,704 AUD
£4,261 GBP
View
Price last confirmed 25 days ago
Most Expensive
C
William & Sons Jewelers
cert_2567210753 · Nov 2
$12,985 AUD
$9,121 USD
View
Final sale: no returns
16 more retailers have this diamond
Prices start from $3,254 AUDSave up to $9,730 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Cushion
$3,254 AUD